keyword
MENU ▼
Read by QxMD icon Read
search

SPAK

keyword
https://www.readbyqxmd.com/read/28289184/renal-tubular-ubiquitin-protein-ligase-nedd4-2-is-required-for-renal-adaptation-during-long-term-potassium-depletion
#1
Lama Al-Qusairi, Denis Basquin, Ankita Roy, Renuga Devi Rajaram, Marc P Maillard, Arohan R Subramanya, Olivier Staub
Adaptation of the organism to potassium (K(+)) deficiency requires precise coordination among organs involved in K(+) homeostasis, including muscle, liver, and kidney. How the latter performs functional and molecular changes to ensure K(+) retention is not well understood. Here, we investigated the role of ubiquitin-protein ligase NEDD4-2, which negatively regulates the epithelial sodium channel (ENaC), Na(+)/Cl(-) cotransporter (NCC), and with no-lysine-kinase 1 (WNK1). After dietary K(+) restriction for 2 weeks, compared with control littermates, inducible renal tubular NEDD4-2 knockout (Nedd4L(Pax8/LC1) ) mice exhibited severe hypokalemia and urinary K(+) wasting...
March 13, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28282258/wnk1-is-an-unexpected-autophagy-inhibitor
#2
Sachith Gallolu Kankanamalage, A-Young Lee, Chonlarat Wichaidit, Andres Lorente-Rodriguez, Akansha M Shah, Steve Stippec, Angelique W Whitehurst, Melanie H Cobb
Autophagy is a cellular degradation pathway that is essential to maintain cellular physiology, and deregulation of autophagy leads to multiple diseases in humans. In a recent study, we discovered that the protein kinase WNK1 (WNK lysine deficient protein kinase 1) is an inhibitor of autophagy. The loss of WNK1 increases both basal and starvation-induced autophagy. In addition, the depletion of WNK1 increases the activation of the class III phosphatidylinositol 3-kinase (PtdIns3K) complex, which is required to induce autophagy...
February 15, 2017: Autophagy
https://www.readbyqxmd.com/read/28276587/phosphoregulation-of-k-cl-cotransporters-during-cell-swelling-novel-insights
#3
Rachelle Frenette-Cotton, Andrée-Anne Marcoux, Alexandre P Garneau, Micheline Noel, Paul Isenring
The K(+) -Cl(-) cotransporters (KCCs) belong to the cation-Cl(-) cotransporter family and consist of 4 isoforms and many splice variants. Their main role is to promote electroneutral efflux of K(+) and Cl(-) ions across the surface of many cell types and, thereby, to regulate intracellular ion concentration, cell volume and epithelial salt movement. These transport systems are induced by an increase in cell volume and are less active at lower intracellular [Cl(-) ] (Cli ), but the mechanisms at play are still ill-defined...
March 9, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28178566/wnk-kinase-signaling-in-ion-homeostasis-and-human-disease
#4
REVIEW
Masoud Shekarabi, Jinwei Zhang, Arjun R Khanna, David H Ellison, Eric Delpire, Kristopher T Kahle
WNK kinases, along with their upstream regulators (CUL3/KLHL3) and downstream targets (the SPAK/OSR1 kinases and the cation-Cl(-) cotransporters [CCCs]), comprise a signaling cascade essential for ion homeostasis in the kidney and nervous system. Recent work has furthered our understanding of the WNKs in epithelial transport, cell volume homeostasis, and GABA signaling, and uncovered novel roles for this pathway in immune cell function and cell proliferation.
February 7, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28160044/clinical-characteristics-of-pediatric-hiv-1-patients-treated-with-first-line-antiretroviral-therapy-in-vietnam-a-nested-case-control-study
#5
Minh Diem Dang, Duc Minh Nguyen, Huu Bich Tran, Viet Hung Pham, Daryl Spak, Linh Chi Pham, Thi Quynh Phan, Thi Thanh Dinh, Thi Kim Anh Le, Van Lam Nguyen, Thanh Hai Le, Son Ngoc Hoang, Vu Phuong Linh Dang
OBJECTIVES: Over the past decades, Vietnam has made great strides in reducing the rate of mortality in HIV-related deaths, due to increased access of antiretroviral therapy (ART); however, given the significantly high level of treatment failure (TF), it is essential to identify markers that describe the failure of ART in HIV-1 infected children. METHODS: A nested case-control study was conducted with clinical data collected from 101 HIV-infected children [26 TF and 75 treatment success (TS)] at National Hospital of Pediatrics, Vietnam (2008-2012)...
February 2017: International Journal of Public Health
https://www.readbyqxmd.com/read/28131457/bi-rads-%C3%A2-fifth-edition-a-summary-of-changes
#6
D A Spak, J S Plaxco, L Santiago, M J Dryden, B E Dogan
The Breast Imaging Reporting and Data System (BI-RADS(®)) is a standardized system of reporting breast pathology as seen on mammogram, ultrasound, and magnetic resonance imaging. It encourages consistency between reports and facilitates clear communication between the radiologist and other physicians by providing a lexicon of descriptors, a reporting structure that relates assessment categories to management recommendations, and a framework for data collection and auditing. This article highlights the changes made to the BI-RADS(®) atlas 5th edition by comparison with its predecessor, provide a useful resource for a radiologist attempting to review the recent changes to the new edition, and serve as a quick reference to those who have previously become familiar with the material...
January 25, 2017: Diagnostic and Interventional Imaging
https://www.readbyqxmd.com/read/28096417/phosphorylation-by-pkc-and-pka-regulate-the-kinase-activity-and-downstream-signaling-of-wnk4
#7
Maria Castañeda-Bueno, Juan Pablo Arroyo, Junhui Zhang, Jeremy Puthumana, Orlando Yarborough, Shigeru Shibata, Lorena Rojas-Vega, Gerardo Gamba, Jesse Rinehart, Richard P Lifton
With-no-lysine kinase 4 (WNK4) regulates electrolyte homeostasis and blood pressure. WNK4 phosphorylates the kinases SPAK (Ste20-related proline alanine-rich kinase) and OSR1 (oxidative stress responsive kinase), which then phosphorylate and activate the renal Na-Cl cotransporter (NCC). WNK4 levels are regulated by binding to Kelch-like 3, targeting WNK4 for ubiquitylation and degradation. Phosphorylation of Kelch-like 3 by PKC or PKA downstream of AngII or vasopressin signaling, respectively, abrogates binding...
January 31, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28094285/urinary-exosomes-contain-micrornas-capable-of-paracrine-modulation-of-tubular-transporters-in-kidney
#8
Tannia Gracia, Xiaonan Wang, Ya Su, Elizabeth E Norgett, Timothy L Williams, Pablo Moreno, Gos Micklem, Fiona E Karet Frankl
Exosomes derived from all nephron segments are present in human urine, where their functionality is incompletely understood. Most studies have focused on biomarker discovery rather than exosome function. Through sequencing we identified the miRNA repertoire of urinary exosomes from healthy volunteers; 276 mature miRNAs and 345 pre-miRNAs were identified (43%/7% of reads). Among the most abundant were members of the miR-10, miR-30 and let-7 families. Targets for the identified miRNAs were predicted using five different databases; genes encoding membrane transporters and their regulators were enriched, highlighting the possibility that these miRNAs could modulate key renal tubular functions in a paracrine manner...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28094030/glucocorticoid-induced-leucine-zipper-protein-regulates-sodium-and-potassium-balance-in-the-distal-nephron
#9
Priyanka Rashmi, GianLuca Colussi, Michael Ng, Xinhao Wu, Atif Kidwai, David Pearce
Glucocorticoid induced leucine zipper protein (GILZ) is an aldosterone-regulated protein that controls sodium transport in cultured kidney epithelial cells. Mice lacking GILZ have been reported previously to have electrolyte abnormalities. However, the mechanistic basis has not been explored. Here we provide evidence supporting a role for GILZ in modulating the balance of renal sodium and potassium excretion by regulating the sodium-chloride cotransporter (NCC) activity in the distal nephron. Gilz(-/-) mice have a higher plasma potassium concentration and lower fractional excretion of potassium than wild type mice...
January 13, 2017: Kidney International
https://www.readbyqxmd.com/read/28070462/simulated-mussel-mortality-thresholds-as-a-function-of-mussel-biomass-and-nutrient-loading
#10
Jeremy S Bril, Kathryn Langenfeld, Craig L Just, Scott N Spak, Teresa J Newton
A freshwater "mussel mortality threshold" was explored as a function of porewater ammonium (NH4(+)) concentration, mussel biomass, and total nitrogen (N) utilizing a numerical model calibrated with data from mesocosms with and without mussels. A mortality threshold of 2 mg-N L(-1) porewater NH4(+) was selected based on a study that estimated 100% mortality of juvenile Lampsilis mussels exposed to 1.9 mg-N L(-1) NH4(+) in equilibrium with 0.18 mg-N L(-1) NH3. At the highest simulated mussel biomass (560 g m(-2)) and the lowest simulated influent water "food" concentration (0...
2017: PeerJ
https://www.readbyqxmd.com/read/28004876/towards-the-development-of-small-molecule-mo25-binders-as-potential-indirect-spak-osr1-kinase-inhibitors
#11
Hachemi Kadri, Mubarak A Alamri, Iva H Navratilova, Luke J Alderwick, Nigel S Simpkins, Youcef Mehellou
The binding of the scaffolding protein MO25 to SPAK and OSR1 protein kinases, which regulate ion homeostasis, causes increases of up to 100-fold in their catalytic activity. Various animal models have shown that the inhibition of SPAK and OSR1 lowers blood pressure, and so here we present a new indirect approach to inhibiting SPAK and OSR1 kinases by targeting their protein partner MO25. To explore this approach, we developed a fluorescent polarisation assay and used it in screening of a small in-house library of ≈4000 compounds...
December 22, 2016: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28003191/calcineurin-inhibitor-cyclosporine-a-activates-renal-na-k-cl-cotransporters-via-local-and-systemic-mechanisms
#12
Katharina Ilse Blankenstein, Aljona Borschewski, Robert Labes, Alexander Paliege, Christin Boldt, James A McCormick, David H Ellison, Michael Bader, Sebastian Bachmann, Kerim Mutig
Calcineurin dephosphorylates NFAT transcription factors, thereby facilitating T-cell mediated immune responses. Calcineurin inhibitors are instrumental for immunosuppression after organ transplantation, but may cause side effects including hypertension and electrolyte disorders. Kidneys were recently shown to display activation of the furosemide-sensitive Na-K-2Cl cotransporter (NKCC2) of the thick ascending limb and the thiazide-sensitive Na-Cl cotransporter (NCC) of the distal convoluted tubule upon calcineurin inhibition using cyclosporin A (CsA)...
December 21, 2016: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/27986254/inhibition-of-na-k-cl-cotransporter-isoform-1-reduces-lung-injury-induced-by-ischemia-reperfusion
#13
Chou-Chin Lan, Chung-Kan Peng, Shih-En Tang, Hsueh-Ju Lin, Sung-Sen Yang, Chin-Pyng Wu, Kun-Lun Huang
OBJECTIVES: Ischemia-reperfusion acute lung injury is characterized by increased vascular permeability, lung edema, and neutrophil sequestration. Ischemia-reperfusion acute lung injury occurs in lung transplantation and other major surgical procedures. Effective regulation of alveolar fluid balance is critical for pulmonary edema. Sodium-potassium-chloride co-transporter regulates alveolar fluid and is associated with inflammation. We hypothesized that sodium-potassium-chloride co-transporter is important in ischemia-reperfusion acute lung injury...
January 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/27983989/potassium-depletion-stimulates-na-cl-cotransporter-via-phosphorylation-and-inactivation-of-the-ubiquitin-ligase-kelch-like-3
#14
Kenichi Ishizawa, Ning Xu, Johannes Loffing, Richard P Lifton, Toshiro Fujita, Shunya Uchida, Shigeru Shibata
Kelch-like 3 (KLHL3) is a component of an E3 ubiquitin ligase complex that regulates blood pressure by targeting With-No-Lysine (WNK) kinases for degradation. Mutations in KLHL3 cause constitutively increased renal salt reabsorption and impaired K(+) secretion, resulting in hypertension and hyperkalemia. Although clinical studies have shown that dietary K(+) intake affects blood pressure, the mechanisms have been obscure. In this study, we demonstrate that the KLHL3 ubiquitin ligase complex is involved in the low-K(+)-mediated activation of Na-Cl cotransporter (NCC) in the kidney...
October 28, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27942049/potassium-depletion-stimulates-na-cl-cotransporter-via-phosphorylation-and-inactivation-of-the-ubiquitin-ligase-kelch-like-3
#15
Kenichi Ishizawa, Ning Xu, Johannes Loffing, Richard P Lifton, Toshiro Fujita, Shunya Uchida, Shigeru Shibata
Kelch-like 3 (KLHL3) is a component of an E3 ubiquitin ligase complex that regulates blood pressure by targeting With-No-Lysine (WNK) kinases for degradation. Mutations in KLHL3 cause constitutively increased renal salt reabsorption and impaired K(+) secretion, resulting in hypertension and hyperkalemia. Although clinical studies have shown that dietary K(+) intake affects blood pressure, the mechanisms have been obscure. In this study, we demonstrate that the KLHL3 ubiquitin ligase complex is involved in the low-K(+)-mediated activation of Na-Cl cotransporter (NCC) in the kidney...
2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27905692/remote-pre-procedural-ischemic-stroke-was-the-strongest-risk-for-stroke-and-death-associated-with-carotid-stenting-a-single-center-experience
#16
Mária Rašiová, Ľubomír Špak, Ľudmila Farkašová, Štefan Pataky, Martin Koščo, Marek Hudák, Matej Moščovič, Norbert Leško
BACKGROUND: The goal of carotid artery stenting (CAS) is to decrease the stroke risk in patients with carotid stenosis. This procedure carries an immediate risk of stroke and death and many patients do not benefit from it, especially asymptomatic patients. Patient selection for carotid procedure who benefit from procedure and who is the procedure hazardous for is important. Remote ischemic stroke is known risk factor for stroke reccurence during surgery. The aim of our study was to determine the periprocedural complication risk (within 30 days after CAS) associated with carotid stenting (stroke, death) between patients with remote pre- procedural ischemic stroke and without it; to analyse periprocedural risk in other specific patient subgroups treated with CAS and to determine the impact of observed variables on all- cause mortality during long-term follow-up...
December 1, 2016: International Angiology: a Journal of the International Union of Angiology
https://www.readbyqxmd.com/read/27853306/osr1-and-spak-cooperatively-modulate-sertoli-cell-support-of-mouse-spermatogenesis
#17
Yung-Liang Liu, Sung-Sen Yang, Shyi-Jou Chen, Yu-Chun Lin, Chin-Chen Chu, Hsin-Hui Huang, Fung-Wei Chang, Mu-Hsien Yu, Shih-Hua Lin, Gwo-Jang Wu, Huey-Kang Sytwu
We investigated the role of oxidative stress-responsive kinase-1 (OSR1) and STE20 (sterile 20)/SPS1-related proline/alanine-rich kinase (SPAK), upstream regulators of the Na(+)-K(+)-2Cl(-) cotransporter (NKCC1)-essential for spermatogenesis-in mouse models of male fertility. Global OSR1(+/-) gene mutations, but not global SPAK(-/-) or Sertoli cell (SC)-specific OSR1 gene knockout (SC-OSR1(-/-)), cause subfertility with impaired sperm function and are associated with reduced abundance of phosphorylated (p)-NKCC1 but increased p-SPAK expression in testicular tissue and spermatozoa...
November 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27782176/functional-kinomics-establishes-a-critical-node-of-volume-sensitive-cation-cl-cotransporter-regulation-in-the-mammalian-brain
#18
Jinwei Zhang, Geng Gao, Gulnaz Begum, Jinhua Wang, Arjun R Khanna, Boris E Shmukler, Gerrit M Daubner, Paola de Los Heros, Paul Davies, Joby Varghese, Mohammad Iqbal H Bhuiyan, Jinjing Duan, Jin Zhang, Daniel Duran, Seth L Alper, Dandan Sun, Stephen J Elledge, Dario R Alessi, Kristopher T Kahle
Cell volume homeostasis requires the dynamically regulated transport of ions across the plasmalemma. While the ensemble of ion transport proteins involved in cell volume regulation is well established, the molecular coordinators of their activities remain poorly characterized. We utilized a functional kinomics approach including a kinome-wide siRNA-phosphoproteomic screen, a high-content kinase inhibitor screen, and a kinase trapping-Orbitrap mass spectroscopy screen to systematically identify essential kinase regulators of KCC3 Thr(991)/Thr(1048) phosphorylation - a key signaling event in cell swelling-induced regulatory volume decrease (RVD)...
October 26, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27771793/identification-and-characterization-of-a-new-member-of-the-genus-luteovirus-from-cherry
#19
O Lenz, J Přibylová, J Fránová, I Koloniuk, J Špak
The complete genomic sequence of a new virus from cherry trees was determined. Its genome is 5857 nt long and resembles that of members of the genus Luteovirus in its genomic organization and nucleotide sequence. Based on the species demarcation criteria for luteoviruses, the virus represents a new luteovirus species. Furthermore, a 47-nt-long inverted repeat was found at the 3' end of its genome. The virus has been provisionally named cherry-associated luteovirus (ChALV) and is the fourth member of the family Luteoviridae reported to naturally infect woody plants...
February 2017: Archives of Virology
https://www.readbyqxmd.com/read/27754152/os-29-04-sympathetic-nervous-system-regulation-of-the-renal-ncc-and-blood-pressure-during-high-dietary-salt-intake
#20
Richard Wainford, Kathryn Walsh
OBJECTIVE: These studies tested the hypothesis that the SNS release of norepinephrine modulates NCC activity via a WNK1 mechanism to contribute to the pathophysiology of salt-sensitive hypertension in rats. DESIGN AND METHOD: Male Sprague-Dawley (SD) rats receiving a continuous s.c. saline or NE (600 ng/min) infusion or naïve Dahl Salt-Resistant (DSR) and Dahl Salt-Sensitive (DSS) rats were fed a 0.6% (NS) or 8% NaCl (HS) diet for 14 or 21 days respectively (N = 6/group)...
September 2016: Journal of Hypertension
keyword
keyword
64607
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"